Two Line System - Riello R35 Series Installation Manual

TWO LINE (LIFT) SYSTEM
A) Install BY-PASS PLUG. (See FIG. 12)
B) Suction and return lines should be the same diameter and both should extend to the same
depth inside the fuel tank. Do not exceed the pipe lengths indicated below in FIG 14.
C) The suction and return line connections to the pump can be made using ¼" NPTF fitting.
Ensure that the connections are tight with no air leaks.
WARNING: When the pump operates on a Two-line system, before starting the burner,
make sure the RETURN LINE is not restricted in any way. Any excessive back pressure
will cause damage to the pump shaft seal.
2 LINE (LIFT) SYSTEM
PIPE LENGTHS
H 3/8" OD
Feet Meters Feet
0.0 0.0 115
1.5 0.5 100
3.0 1.0 80
5.0 1.5 65
6.5 2.0 50
9.5 3.0 25
11 3.5 20
NOTE: Do not exceed pipe lengths indicated in
chart.
WARNING: Height "P" should not exceed 13
Feet (4 m)
WARNING: The height "P" in PIPE LENGTH for the tables in FIG. 13 and FIG.
14 should not exceed 13 feet (4 m)
WARNING: The vacuum should not exceed 11.44 inches of mercury.
WARNING: Check for leaks when the oil supply valve is opened.
IMPORTANT: An external, appropriately listed and certified oil filter must be
placed in the fuel line BETWEEN the FUEL TANK and the BURNER PUMP.
½" OD
Meters Feet Meters
35 330 100
30 330 100
25 330 100
20 295 90
15 230 70
8 100 30
6 65 20
H
12
FIG. 14
P
H